Systems and methods for mapping the distribution of residue material in an environment in which one or more agricultural machines are operable. A sensing arrangement having one or more sensors mounted or otherwise coupled to an agricultural machine operating within the environment is used to obtain sensor data indicative of residue material spread by a spreader tool of the agricultural machine. From this a local distribution of residue material associated with the spreader tool is determined which is used to update a map of a global distribution of the residue material across the environment. The map comprises a grid-based map having a plurality of cells corresponding to sub-regions within the environment, wherein a value associated with each cell is representative of a measure of the residue material present within the corresponding sub-region.

A crop residue monitoring system may include a harvester, a camera to capture an image of crop residue generated by the harvester, an analytical unit to derive a value for a crop residue parameter of the crop residue based upon an optical analysis of the image and a control unit to adjust a subsequent field operation based upon the value of the crop residue parameter.

Systems and methods for monitoring the distribution of residue material from a spreader tool of an agricultural machine including a sensor, preferably a LIDAR or other scanning transceiver-type sensor mounted or otherwise coupled to the machine and orientated with a sensing region pointing rearwards of the agricultural machine, where operational data indicative of an operational parameter of the spreader tool is obtained and used to control operation of the sensor.

Systems and methods for monitoring the distribution of residue material from a spreader tool of an agricultural machine including an imaging sensor coupled to an unloading auger of the agricultural machine used to image an area to the rear of the agricultural machine where the Image data is analysed to determine a distribution of residue material associated with the spreader tool and one or more operational parameters of the agricultural machine or components are controlled based on the determined distribution.

Systems and methods for monitoring the distribution of residue material from a spreader tool of an agricultural machine including receiving image data from an imaging sensor indicative of a residue material spread by the spreader tool within a sensing region rearwards of the agricultural machine and where one or more image transformations are applied to image data to generate an enhanced image of the distribution of the residue material including colour, distortion and/or correction transformations for generating an enhanced image for view by an operator of the machine and controlling a user interface associated with the agricultural machine to provide an indicator indicative of the enhanced image which is easily interpreted.

Systems and methods for monitoring the distribution of residue material from a spreader tool of an agricultural machine including a first sensor with a sensing region defining a first sensing boundary corresponding to a first direction with respect to the agricultural machine, a second sensor with a sensing region defining a second sensing boundary corresponding to a second direction with respect to the agricultural machine, and using the sensing data from the first and second sensors to determine a distribution of residue material associated with the spreader tool. One or more systems of the agricultural machine are then controlled based on the determined distribution.

A residue management system comprises a chopper to chop crop residue, a residue spreader, and a floor extension. The residue spreader is mounted for pivotable movement relative to the chopper between a dispersal position to disperse crop residue and a windrow position to deposit crop residue in a windrow. The residue spreader comprises a first spreading device, a second spreading device, and a splitter positioned laterally between the first and second spreading devices to divide flow of crop residue therebetween. A floor of the chopper and a floor of the residue spreader are spaced apart from one another to define a gap. The floor extension projects rearwardly from the floor of the chopper partially over the floor of the residue spreader about the gap alongside the splitter to guide flow of crop residue from the chopper to the residue spreader.

A chopper arrangement for an agricultural harvester, having a housing and a plurality of rotatable knife rows in the housing. The chopper arrangement includes a counter knife arrangement including a first counter knife bank and a second counter knife bank downstream of the first counter knife bank. The counter knife arrangement is movable between an engaged position, in which the first and second counter knife banks at least partially overlap the plurality of rotatable knife rows, and a disengaged position, in which the first and second counter knife banks are retracted away from the plurality of rotatable knife rows. The counter knife arrangement also includes a mechanical linkage coupling the first counter knife bank to the second counter knife bank to provide for simultaneous movement of the first and second counter knife banks upon actuation of the counter knife arrangement between the engaged and disengaged positions.

Weed seeds are destroyed in the chaff from a combine harvester by repeated high speed impacts caused by a rotor mounted in one of a pair of side by side housings which accelerate the discarded seeds in a direction centrifugally away from the rotor onto a stator including angularly adjustable stator surfaces around the axis. The weed seed destructor is driven with a straw management system from an output shaft of the combine harvester so that the full power required for both passes through a belt which includes more than four longitudinally extending v-belt ribs and reinforcing cords located in a base band above the ribs at uniformly spaced positions across the width of the belt so that a replacement drive pulley on the output shaft has a width not significantly greater than a conventional output pulley which it replaces.

A combine harvester includes a straw chopper, spreading device and a weed seed destructor (WSD) which acts on the weed seeds in the chaff so as to cause devitalization. The WSD includes a discharge mouth where the WSD causes generation of an air flow which exits through the mouth. The system is operable in two modes where in both the straw is directed to the straw spreading device. In the first mode the chaff is directed into the WSD and in the second mode the chaff is carried past the WSD on a guide surface and is converged inwardly to drop into the air stream from the WSD. In both modes the chaff is spread using the air stream from the WSD at least to the sides either by feeding to the spreading device or by combining with the stream of straw after it leaves the spreading device.